Problem

CFTH07E TFIL task Synchronization error

CFTH03E Error sending data on network

Resolution

This is usually related to an unpredictable TCP error or a too slow system / TCP that messed-up the Transfer CFT inter-task communication.

The issue can also be related to a temporary heavy loaded system with CFT not set as a Non-Swappable application.

To improve the performance Transfer CFT should be started as Started Task in a Non-Swappable TP class.

Moreover, to avoid a bottleneck with TCP-IP, CFT Started Task should be in the same performance group than TCP-IP Started Task.

Note: latest versions / SP includes a change to trap such a condition externally:

When a major TCP error was found, the Transfer CFT TCP task tried to stop but went into a loop.
A specific CTCP01F message is now sent for JESMSGLG, and a dump is processed (assert). Additionally, more messages can be found on TCPOUT.

Message text: CTCP01F Unpredictable TCP error, Forced Dump, monitor restart needed.